.flex {
  display: flex;
}
.column {
  flex-direction: column;
}
.between {
  justify-content: between;
}
.middle {
  align-items: center;
}
.pointer {
  cursor: pointer;
}
.el-backtop {
  width: 90px;
  height: 90px;
  border-radius: 0;
  background: rgba(0, 0, 0, 0.3);
  p {
    color: #ffff;
    margin: 0;
  }
  &:hover {
    background: rgba(0, 0, 0, 0.3);
  }
}
